The phrase "to hang over" means to remain unresolved or undecided, often referring to a situation that is causing anxiety or uncertainty. Full definition
To be honest, you're likely to find these sorts of questions hanging over most exchanges, as the public doesn't quite trust the cryptocurrency world as a whole yet. (dailybitcoinnews.com)
If you are still hung over from last night's celebrations, I regret to announce that we have more drinking to do — because today is our trophy parade! (justarsenal.com)